View All Items

Title: MACROECONOMIC INDICATORS AS DETERMINANTS OF THE U.S. DOLLAR AS A PRIMARY RESERVE CURRENCY.
Creator: Salgado, Joel, Aysun, Uluc, University of Central Florida
Abstract / Description: Several currencies have arisen as credible competitors for the dollar's primary reserve currency position in central banks around the globe, and many wonder how long the dollar can maintain its position. Reserve currency usage is dependent relative to the size of the home economy, openness to trade, and prosperous and stable growth, including an inertial bias. This paper utilizes econometric methods to examine the significance of macroeconomic indicators of the U.S. dollar's reserve currency...
Show moreSeveral currencies have arisen as credible competitors for the dollar's primary reserve currency position in central banks around the globe, and many wonder how long the dollar can maintain its position. Reserve currency usage is dependent relative to the size of the home economy, openness to trade, and prosperous and stable growth, including an inertial bias. This paper utilizes econometric methods to examine the significance of macroeconomic indicators of the U.S. dollar's reserve currency status. The dataset is gathered from the IMF's COFER database using a time period from 2000 to 2013 in order to capture the most relevant reserve levels post-euro adoption. The estimated coefficient values indicate a significant inertial bias. This result implies that we can expect the dollar to hold the primary reserve currency position for the near future.
Show less
Date Issued: 2015
Identifier: CFH0004803, ucf:45470
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFH0004803

Title: CENTRAL FLORIDA HIGH SCHOOL PRINCIPALS' PERCEPTIONS OF THE FLORIDA SCHOOL INDICATORS REPORT.
Creator: Gaught, William, Hahs-Vaughn, Debbie, University of Central Florida
Abstract / Description: The purpose of this study was to identify the perceptions that central Florida public high school principals had regarding the Florida School Indicators Report (FSIR) and its usefulness. The FSIR, published by the Florida Department of Education, was designed to be a comprehensive, single source document for parents, lawmakers, and school administrators to compare key performance indicators to similar schools or districts state wide. It provided information on 74 different indicators of...
Show moreThe purpose of this study was to identify the perceptions that central Florida public high school principals had regarding the Florida School Indicators Report (FSIR) and its usefulness. The FSIR, published by the Florida Department of Education, was designed to be a comprehensive, single source document for parents, lawmakers, and school administrators to compare key performance indicators to similar schools or districts state wide. It provided information on 74 different indicators of school or district performance. A total of 70 public high school principals from 13 central Florida school districts responded to a postal survey and provided their perceptions regarding the importance of indicators in the FSIR, how they used the FSIR at their schools, and what barriers they felt affected the ability of their administrative staffs to collect and analyze data on the FSIR indicators. Eighteen of the 70 principals participated in follow-up telephone interviews. Quantitative and qualitative analysis of the postal surveys and interviews revealed the principals perceived FSIR indicators related to Florida's mandated Florida Comprehensive Assessment Test (FCAT) as the most important indictors in the FSIR. The indicators FCAT Results and FCAT Writes were ranked first and second respectively in priority by the participating principals. This finding demonstrated the importance that principals placed on the state's high-stakes test. Other categories of FSIR indicators are were also ranked in the findings reported in this study, along with how the principals used the FSIR at their schools. The data collected from the postal survey revealed there was a statistically significant relationship between the priority principals assigned to the FSIR indicators and their ability to collect and analyze data related to them. In addition, survey data allowed development of multiple regression models that could be used to predict the priority principals assigned to several FSIR categories of indicators based on the ability to collect and analyze data. The study findings indicated that principals perceived lack of time for data analysis as the biggest barrier they faced when evaluating the FSIR indicators. After the lack of time, principals rated lack of administrator training in data analysis as the second biggest obstacle to using the FSIR. The findings indicated that principals felt the availability of data and technology were not significant barriers to their staff's ability to conduct data analysis on the FSIR. The conclusions drawn from the study were that central Florida high school principals perceived the results on the state's mandated Florida Comprehensive Assessment Test (FCAT) to be the most important indicators in the FSIR. In addition, the research identified that the lack of time was the single greatest barrier principals encountered when it came to collecting and analyzing data on the FSIR. A lack of training programs in data collection and analysis for administrators was also noted in the findings.
Show less
Date Issued: 2007
Identifier: CFE0001688, ucf:47204
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001688

Title: NETWORK PERFORMANCE MANAGEMENT USING APPLICATION-CENTRIC KEY PERFORMANCE INDICATORS.
Creator: McGill, Susan, Shumaker, Randall, University of Central Florida
Abstract / Description: The Internet and intranets are viewed as capable of supplying "Anything, Anywhere, Anytime" and e-commerce, e-government, e-community, and military C4I are now deploying many and varied applications to serve their needs. Network management is currently centralized in operations centers. To assure customer satisfaction with the network performance they typically plan, configure and monitor the network devices to insure an excess of bandwidth, that is overprovision. If this proves uneconomical...
Show moreThe Internet and intranets are viewed as capable of supplying "Anything, Anywhere, Anytime" and e-commerce, e-government, e-community, and military C4I are now deploying many and varied applications to serve their needs. Network management is currently centralized in operations centers. To assure customer satisfaction with the network performance they typically plan, configure and monitor the network devices to insure an excess of bandwidth, that is overprovision. If this proves uneconomical or if complex and poorly understood interactions of equipment, protocols and application traffic degrade performance creating customer dissatisfaction, another more application-centric, way of managing the network will be needed. This research investigates a new qualitative class of network performance measures derived from the current quantitative metrics known as quality of service (QOS) parameters. The proposed class of qualitative indicators focuses on utilizing current network performance measures (QOS values) to derive abstract quality of experience (QOE) indicators by application class. These measures may provide a more user or application-centric means of assessing network performance even when some individual QOS parameters approach or exceed specified levels. The mathematics of functional analysis suggests treating QOS performance values as a vector, and, by mapping the degradation of the application performance to a characteristic lp-norm curve, a qualitative QOE value (good/poor) can be calculated for each application class. A similar procedure could calculate a QOE node value (satisfactory/unsatisfactory) to represent the service level of the switch or router for the current mix of application traffic. To demonstrate the utility of this approach a discrete event simulation (DES) test-bed, in the OPNET telecommunications simulation environment, was created modeling the topology and traffic of three semi-autonomous networks connected by a backbone. Scenarios, designed to degrade performance by under-provisioning links or nodes, are run to evaluate QOE for an access network. The application classes and traffic load are held constant. Future research would include refinement of the mathematics, many additional simulations and scenarios varying other independent variables. Finally collaboration with researchers in areas as diverse as human computer interaction (HCI), software engineering, teletraffic engineering, and network management will enhance the concepts modeled.
Show less
Date Issued: 2007
Identifier: CFE0001818, ucf:47371
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0001818

Title: INVESTIGATING A POTENTIAL RELATIONSHIP BETWEEN SIBLING GENDER COMPOSITION AND HEALTH BEHAVIOR INDICATORS IN YOUNG ADULT AND ADOLESCENT MALES.
Creator: Goss, Taylor N, Rovito, Michael J., Jasinski, Jana, University of Central Florida
Abstract / Description: The presence of siblings during childhood and adolescence has a significant impact on the behaviors and perceptions of adults later in life. Effects of mixed-gendered sibling dyads on delinquent behavior, gender typing, and romantic and sexual relationships are of interest. These behaviors can lead to notable health disparities, making it imperative to gain insight into factors associated with such behaviors in young adult and adolescent males. This project explored possible correlations...
Show moreThe presence of siblings during childhood and adolescence has a significant impact on the behaviors and perceptions of adults later in life. Effects of mixed-gendered sibling dyads on delinquent behavior, gender typing, and romantic and sexual relationships are of interest. These behaviors can lead to notable health disparities, making it imperative to gain insight into factors associated with such behaviors in young adult and adolescent males. This project explored possible correlations between gender composition of siblings and health behavior indicators for violence, competition and risk, and sexual and romantic relationships. Analysis of these variables was performed using data from the Young Adult and Adolescent Male Health Behavior Indicator Scale [YAAMHBIS]. Descriptive analyses showed YAAM understanding of abuse and successful marriage and relationship qualities, as well as a conditional acceptance of violence, competition, and risk. Means testing between those with and without sisters indicated that those with sisters acknowledged abuse, marriage qualities, and the consequences of infidelity. Additionally, those with sisters had, on average, an earlier age of sexual debut than those without supporting previous research regarding the effects of female communication in childhood on adult interactions. The correlations found between sibling gender and YAAM perceptions later in life could lay the groundwork for future studies further investigating sibling gender or split households and an association with health behaviors.
Show less
Date Issued: 2018
Identifier: CFH2000317, ucf:45807
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFH2000317

Title: NON-INVASIVE POSITIVE PRESSURE VENTILATION (NPPV): ITS USES, COMPLICATIONS, & IMPLICATIONS WITHIN NURSING PRACTICE IN ACUTE CARE SETTINGS.
Creator: Marano, Alexis, Sole, Mary, University of Central Florida
Abstract / Description: The use of noninvasive positive pressure ventilation (NPPV) in acute care settings has drastically increased within the past 20 years. Research has indicated that NPPV is equally as effective as traditional mechanical ventilation(MV) in treating acute exacerbations of chronic pulmonary obstructive disease (COPD) and cardiogenic pulmonary edema. Furthermore, the risk of complication from NPPV is much lower than MV, in terms of ventilator-associated pneumonia and sepsis. It is imperative for...
Show moreThe use of noninvasive positive pressure ventilation (NPPV) in acute care settings has drastically increased within the past 20 years. Research has indicated that NPPV is equally as effective as traditional mechanical ventilation(MV) in treating acute exacerbations of chronic pulmonary obstructive disease (COPD) and cardiogenic pulmonary edema. Furthermore, the risk of complication from NPPV is much lower than MV, in terms of ventilator-associated pneumonia and sepsis. It is imperative for the nurse to understand the various indications, interfaces, and potential complications associated with NPPV use. In addition to treating acute exacerbations of COPD and cardiogenic pulmonary edema, NPPV has been used for prevention of reintubation, palliative care, and status asthmaticus. Furthermore, NPPV could be delivered through various interfaces, such as nasal, facial, and helmet. Each of these interfaces could eventually cause complications for the patient, such as skin ulceration and sepsis. However, there is limited amount of research available discussing the role of the nurse in caring for the patient with NPPV. There are no standardized guidelines established to assist the nurse in this care, in terms of interface selection, prevention of complications, and staffing patterns. Several recommendations are presented at the end of this thesis to guide future nursing research, education, and clinical practice, such as exploring the role of oral care and education for NPPV patients.
Show less
Date Issued: 2012
Identifier: CFH0004276, ucf:44937
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFH0004276

Title: Modeling the innovation ecosystem and development of a dynamic innovation index.
Creator: Schoen, Henriette, Karwowski, Waldemar, Hoekstra, Robert, Shumaker, Randall, Akbas, Mustafa, University of Central Florida
Abstract / Description: The topic of innovation currently generates a tremendous amount of interest around the world. Innovation is considered an essential part of the solution to creating more jobs and improving the socio-economic conditions of many countries around the globe. Innovation comes about through the existence of many interrelated solutions to socio-economic problems in an extensively interconnected network, which create value for each other. Such a complex creativity and innovation value-creating...
Show moreThe topic of innovation currently generates a tremendous amount of interest around the world. Innovation is considered an essential part of the solution to creating more jobs and improving the socio-economic conditions of many countries around the globe. Innovation comes about through the existence of many interrelated solutions to socio-economic problems in an extensively interconnected network, which create value for each other. Such a complex creativity and innovation value-creating network is here called an Innovation Ecosystem (IE). The main objective of this dissertation research is to improve the current understanding of the IE by developing a simulation model that uses a broad set of relevant static and dynamic variables and incorporates the principles of system dynamics (SD). The proposed model, which is named the IECO-model is based on the relationships between 91 variables and the combined influences of the 43 parameters. Available data for 32 countries, representing a full span of GDP worldwide, was used to study the level of innovation in each of these countries. The result of the developed IECO-model is a novel ranking of the level of innovation through a dynamic innovation index, called the DII. The DII is a new tool to evaluate the innovation and entrepreneurship level of a given country in the context of the global economy. The most significant differentiator from other existing indices of innovation is that the DII is focusing more on the entrepreneurship qualities in 19 of the 43 parameters by looking at cultural values and belief systems, the social context, existing entrepreneurial culture, innovation attitudes, and mentality of each of the considered countries. According to DII-based ranking, the ten most innovative countries in the world are 1. Switzerland, 2. USA, 3. Finland, 4. Netherlands, 5. Iceland, 6. Sweden, 7. Germany, 8. Denmark, 9. The United Kingdom, and 10. Austria.
Show less
Date Issued: 2018
Identifier: CFE0007586, ucf:52537
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0007586

Title: Political, Economic, and Health Determinants of Tuberculosis Incidence.
Creator: Rutherford, Ashley, Unruh, Lynn, Rohde, Kyle, Wan, Thomas, Nobles, Matt, University of Central Florida
Abstract / Description: The epidemiologic transition has shifted major causes of mortality from infectious disease to chronic disease; however, infectious diseases are again re-emerging as a major global concern (Diamond, 1997; Karlen, 1995; McNeil, 1976). This research aimed to identify potential areas of infectious disease influence that are not health-related in order to help governments and policymakers establish new policies, correct current policies, or further address these issues in order to effectively...
Show moreThe epidemiologic transition has shifted major causes of mortality from infectious disease to chronic disease; however, infectious diseases are again re-emerging as a major global concern (Diamond, 1997; Karlen, 1995; McNeil, 1976). This research aimed to identify potential areas of infectious disease influence that are not health-related in order to help governments and policymakers establish new policies, correct current policies, or further address these issues in order to effectively prevent and combat infectious disease. This study employed a retrospective, cross-sectional, non-experimental design via structural equation modeling (SEM) and examined tuberculosis incidence rates at the country-level. Secondary data from open-source, international databases like World Bank's World Development Indicators, World Governance Indicators, and World Health Organization for the year 2014 was utilized. Results revealed that the latent constructs of political stability, health system indicators, and detection policies directly affected tuberculosis incidence rates; they also exhibited an indirect effect due to covariation. Economic stability did not direct affect tuberculosis incidence, but it indirectly influenced incidence through the covariation of political stability, health system indicators, and detection policies. As a country's political stability increased, tuberculosis incidence decreased. As positive health system indicators increased, tuberculosis incidence decreased. Countries with more Xpert detection policies in place experienced an apparent increase in tuberculosis incidence.
Show less
Date Issued: 2016
Identifier: CFE0006842, ucf:51798
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006842

Title: Hidden in Plain Sight: Development and Testing of a Model to Evaluate Political Leadership Tactics.
Creator: Citron, Albert, Hamann, Kerstin, Handberg, Roger, Houghton, David, University of Central Florida
Abstract / Description: This thesis analyzes the kinds of verbal and nonverbal signals elites manifest to show leadership qualities. Launching from Max Weber's conceptual framework of charisma as a power term and Harold Lasswell's study of propaganda, this study takes a multidisciplinary approach to studying political leadership with elements of communication methodology and an ontological basis in evolutionary psychology. The study's goal is to offer a framework for defining and evaluating the diverse signal...
Show moreThis thesis analyzes the kinds of verbal and nonverbal signals elites manifest to show leadership qualities. Launching from Max Weber's conceptual framework of charisma as a power term and Harold Lasswell's study of propaganda, this study takes a multidisciplinary approach to studying political leadership with elements of communication methodology and an ontological basis in evolutionary psychology. The study's goal is to offer a framework for defining and evaluating the diverse signal patterns employed by political elites in three real-life situations. These are the Malta Summit, the 1992 Virginia Presidential Debate, and the 2012 South Carolina Republican Presidential Primary. The cases were chosen because they display a diverse set of signal variations during different types of interactions.The three case studies are evaluated by measuring frequency and patterns of occurrence of the five different interaction constructs (indicator of interest, indicator of disinterest, demonstration of high value, demonstration of low value, and compliance testing) to explain different interaction patterns. A simple frequency distribution of the different signals during a given interaction is used to display the empirical findings and to compare patterns across the case studies. This study reveals that the presence of DLV (demonstration of low value) signals weaken an elite's position in relation to other elites and the public while the presence of DHV (demonstration of high value) signals strengthen an elite's position. It is largely the presence, absence, and frequency of these two signals that determines who conveys leadership qualities effectively regardless of leadership style. Studying the signaling patterns of political elites would allow scholars to understand better the kinds of signal patterns and signal frequencies that are used in different types of leadership styles and norm ranges for signals including for political elites belonging to different cultures and subcultures.
Show less
Date Issued: 2013
Identifier: CFE0004984, ucf:49563
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0004984

Title: STRUCTURAL HEALTH MONITORING WITH EMPHASIS ON COMPUTER VISION, DAMAGE INDICES, AND STATISTICAL ANALYSIS.
Creator: ZAURIN, RICARDO, CATBAS, F. NECATI, University of Central Florida
Abstract / Description: Structural Health Monitoring (SHM) is the sensing and analysis of a structure to detect abnormal behavior, damage and deterioration during regular operations as well as under extreme loadings. SHM is designed to provide objective information for decision-making on safety and serviceability. This research focuses on the SHM of bridges by developing and integrating novel methods and techniques using sensor networks, computer vision, modeling for damage indices and statistical approaches....
Show moreStructural Health Monitoring (SHM) is the sensing and analysis of a structure to detect abnormal behavior, damage and deterioration during regular operations as well as under extreme loadings. SHM is designed to provide objective information for decision-making on safety and serviceability. This research focuses on the SHM of bridges by developing and integrating novel methods and techniques using sensor networks, computer vision, modeling for damage indices and statistical approaches. Effective use of traffic video synchronized with sensor measurements for decision-making is demonstrated. First, some of the computer vision methods and how they can be used for bridge monitoring are presented along with the most common issues and some practical solutions. Second, a conceptual damage index (Unit Influence Line) is formulated using synchronized computer images and sensor data for tracking the structural response under various load conditions. Third, a new index, Nd , is formulated and demonstrated to more effectively identify, localize and quantify damage. Commonly observed damage conditions on real bridges are simulated on a laboratory model for the demonstration of the computer vision method, UIL and the new index. This new method and the index, which are based on outlier detection from the UIL population, can very effectively handle large sets of monitoring data. The methods and techniques are demonstrated on the laboratory model for damage detection and all damage scenarios are identified successfully. Finally, the application of the proposed methods on a real life structure, which has a monitoring system, is presented. It is shown that these methods can be used efficiently for applications such as damage detection and load rating for decision-making. The results from this monitoring project on a movable bridge are demonstrated and presented along with the conclusions and recommendations for future work.
Show less
Date Issued: 2009
Identifier: CFE0002890, ucf:48039
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0002890

Title: FLORIDA SCHOOL INDICATOR REPORT DATA AS PREDICTORS OF HIGH SCHOOL ADEQUATE YEARLY PROGRESS (AYP).
Creator: Carr, John, Bozeman, William, University of Central Florida
Abstract / Description: The focus of this research was to identify variables reported in the 2008-2009 Florida School Indicator Report (FSIR) that had a statistical impact, positive or negative, on the likelihood that a school would achieve Adequate Yearly Progress (AYP) in reading or mathematics using the logistic regression technique. This study analyzed four broad categories reported by the FSIR to include academic, school, student, and teacher characteristics. FSIR and AYP data was collected for 468 Florida high...
Show moreThe focus of this research was to identify variables reported in the 2008-2009 Florida School Indicator Report (FSIR) that had a statistical impact, positive or negative, on the likelihood that a school would achieve Adequate Yearly Progress (AYP) in reading or mathematics using the logistic regression technique. This study analyzed four broad categories reported by the FSIR to include academic, school, student, and teacher characteristics. FSIR and AYP data was collected for 468 Florida high schools that were categorized by the Florida Department of Education as presenting a comprehensive curriculum to grades 9-12 or grades 10-12. It was determined in this study that academic data associated with ACT results and the grade 11 FCAT Science were effective predictors of a school's academic health in reading and mathematics. Student absenteeism showed the greatest impact on a school obtaining AYP in reading while the percentage of students qualifying for free and disabled populations within a school showed the greatest impact on a school obtaining AYP in mathematics. Teachers teaching out of field were identified as having a negative influence on AYP in reading and mathematics while a teacher's experience was considered a positive influence on AYP in mathematics only. Further research is necessary to fully explore the use of logistic regression as a predictive tool at the state, school district, and school level.
Show less
Date Issued: 2011
Identifier: CFE0003638, ucf:48848
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0003638

Title: REFRACTIVE INDICES OF LIQUID CRYSTALS AND THEIR APPLICATIONS IN DISPLAY AND PHOTONIC DEVICES.
Creator: Li, Jun, Wu, Shin-Tson, University of Central Florida
Abstract / Description: Liquid crystals (LCs) are important materials for flat panel display and photonic devices. Most LC devices use electrical field-, magnetic field-, or temperature-induced refractive index change to modulate the incident light. Molecular constituents, wavelength, and temperature are the three primary factors determining the liquid crystal refractive indices: ne and no for the extraordinary and ordinary rays, respectively. In this dissertation, we derive several physical models for describing...
Show moreLiquid crystals (LCs) are important materials for flat panel display and photonic devices. Most LC devices use electrical field-, magnetic field-, or temperature-induced refractive index change to modulate the incident light. Molecular constituents, wavelength, and temperature are the three primary factors determining the liquid crystal refractive indices: ne and no for the extraordinary and ordinary rays, respectively. In this dissertation, we derive several physical models for describing the wavelength and temperature effects on liquid crystal refractive indices, average refractive index, and birefringence. Based on these models, we develop some high temperature gradient refractive index LC mixtures for photonic applications, such as thermal tunable liquid crystal photonic crystal fibers and thermal solitons. Liquid crystal refractive indices decrease as the wavelength increase. Both ne and no saturate in the infrared region. Wavelength effect on LC refractive indices is important for the design of direct-view displays. In Chapter 2, we derive the extended Cauchy models for describing the wavelength effect on liquid crystal refractive indices in the visible and infrared spectral regions based on the three-band model. The three-coefficient Cauchy model could be used for describing the refractive indices of liquid crystals with low, medium, and high birefringence, whereas the two-coefficient Cauchy model is more suitable for low birefringence liquid crystals. The critical value of the birefringence is deltan~0.12. Temperature is another important factor affecting the LC refractive indices. The thermal effect originated from the lamp of projection display would affect the performance of the employed liquid crystal. In Chapter 3, we derive the four-parameter and three-parameter parabolic models for describing the temperature effect on the LC refractive indices based on Vuks model and Haller equation. We validate the empirical Haller equation quantitatively. We also validate that the average refractive index of liquid crystal decreases linearly as the temperature increases. Liquid crystals exhibit a large thermal nonlinearity which is attractive for new photonic applications using photonic crystal fibers. We derive the physical models for describing the temperature gradient of the LC refractive indices, ne and no, based on the four-parameter model. We find that LC exhibits a crossover temperature To at which dno/dT is equal to zero. The physical models of the temperature gradient indicate that ne, the extraordinary refractive index, always decreases as the temperature increases since dne/dT is always negative, whereas no, the ordinary refractive index, decreases as the temperature increases when the temperature is lower than the crossover temperature (dno/dT<0 when the temperature is lower than To) and increases as the temperature increases when the temperature is higher than the crossover temperature (dno/dT>0 when the temperature is higher than To ). Measurements of LC refractive indices play an important role for validating the physical models and the device design. Liquid crystal is anisotropic and the incident linearly polarized light encounters two different refractive indices when the polarization is parallel or perpendicular to the optic axis. The measurement is more complicated than that for an isotropic medium. In Chapter 4, we use a multi-wavelength Abbe refractometer to measure the LC refractive indices in the visible light region. We measured the LC refractive indices at six wavelengths, lamda=450, 486, 546, 589, 633 and 656 nm by changing the filters. We use a circulating constant temperature bath to control the temperature of the sample. The temperature range is from 10 to 55 oC. The refractive index data measured include five low-birefringence liquid crystals, MLC-9200-000, MLC-9200-100, MLC-6608 (delta_epsilon=-4.2), MLC-6241-000, and UCF-280 (delta_epsilon=-4); four middle-birefringence liquid crystals, 5CB, 5PCH, E7, E48 and BL003; four high-birefringence liquid crystals, BL006, BL038, E44 and UCF-35, and two liquid crystals with high dno/dT at room temperature, UCF-1 and UCF-2. The refractive indices of E7 at two infrared wavelengths lamda=1.55 and 10.6 um are measured by the wedged-cell refractometer method. The UV absorption spectra of several liquid crystals, MLC-9200-000, MLC-9200-100, MLC-6608 and TL-216 are measured, too. In section 6.5, we also measure the refractive index of cured optical films of NOA65 and NOA81 using the multi-wavelength Abbe refractometer. In Chapter 5, we use the experimental data measured in Chapter 4 to validate the physical models we derived, the extended three-coefficient and two-coefficient Cauchy models, the four-parameter and three-parameter parabolic models. For the first time, we validate the Vuks model using the experimental data of liquid crystals directly. We also validate the empirical Haller equation for the LC birefringence delta_n and the linear equation for the LC average refractive index . The study of the LC refractive indices explores several new photonic applications for liquid crystals such as high temperature gradient liquid crystals, high thermal tunable liquid crystal photonic crystal fibers, the laser induced 2D+1 thermal solitons in nematic crystals, determination for the infrared refractive indices of liquid crystals, comparative study for refractive index between liquid crystals and photopolymers for polymer dispersed liquid crystal (PDLC) applications, and so on. In Chapter 6, we introduce these applications one by one. First, we formulate two novel liquid crystals, UCF-1 and UCF-2, with high dno/dT at room temperature. The dno/dT of UCF-1 is about 4X higher than that of 5CB at room temperature. Second, we infiltrate UCF-1 into the micro holes around the silica core of a section of three-rod core PCF and set up a highly thermal tunable liquid crystal photonic crystal fiber. The guided mode has an effective area of 440 ƒÝm2 with an insertion loss of less than 0.5dB. The loss is mainly attributed to coupling losses between the index-guided section and the bandgap-guided section. The thermal tuning sensitivity of the spectral position of the bandgap was measured to be 27 nm/degree around room temperature, which is 4.6 times higher than that using the commercial E7 LC mixture operated at a temperature above 50 degree C. Third, the novel liquid crystals UCF-1 and UCF-2 are preferred to trigger the laser-induced thermal solitons in nematic liquid crystal confined in a capillary because of the high positive temperature gradient at room temperature. Fourth, we extrapolate the refractive index data measured at the visible light region to the near and far infrared region basing on the extended Cauchy model and four-parameter model. The extrapolation method is validated by the experimental data measured at the visible light and infrared light regions. Knowing the LC refractive indices at the infrared region is important for some photonic devices operated in this light region. Finally, we make a completely comparative study for refractive index between two photocurable polymers (NOA65 and NOA81) and two series of Merck liquid crystals, E-series (E44, E48, and E7) and BL-series (BL038, BL003 and BL006) in order to optimize the performance of polymer dispersed liquid crystals (PDLC). Among the LC materials we studied, BL038 and E48 are good candidates for making PDLC system incorporating NOA65. The BL038 PDLC cell shows a higher contrast ratio than the E48 cell because BL038 has a better matched ordinary refractive index, higher birefringence, and similar miscibility as compared to E48. Liquid crystals having a good miscibility with polymer, matched ordinary refractive index, and higher birefringence help to improve the PDLC contrast ratio for display applications. In Chapter 7, we give a general summary for the dissertation.
Show less
Date Issued: 2005
Identifier: CFE0000808, ucf:46677
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0000808

Title: An Integrated Design for Six Sigma-Based Framework To Align Strategy, New Process Development, and Customer Requirements In The Airlines Industry.
Creator: Alghamdi, Mohammed, Elshennawy, Ahmad, Rabelo, Luis, Lee, Gene, Ahmad, Ali, University of Central Florida
Abstract / Description: When organizations create new strategy maps, key new processes are often identified. This is important for organizations to stay competitive in the global marketplace. This document describes the development, implementation, and validation of a framework that properly aligns and links an organization's strategy and new process development. The proposed framework integrates the Balanced Scorecard management system (BSC) and the Design for Six Sigma (DFSS) methodology, leveraging their...
Show moreWhen organizations create new strategy maps, key new processes are often identified. This is important for organizations to stay competitive in the global marketplace. This document describes the development, implementation, and validation of a framework that properly aligns and links an organization's strategy and new process development. The proposed framework integrates the Balanced Scorecard management system (BSC) and the Design for Six Sigma (DFSS) methodology, leveraging their strengths, overcoming weaknesses, and identifying lessons learned to help bridge the gap between strategy development and execution. The critical-to-quality conceptual model is used as an integrative component for the framework. Literature search has resulted in little or no research into the development of similar frameworks. To demonstrate and evaluate the effectiveness of the framework in a real-world environment, a case study is carried out and implemented successfully. As the case study progressed, cycle time as a performance indicator was estimated and showed progression towards the targeted strategic objective. The developed framework helps decision-makers seamlessly transit from a strategic position to process development linking strategic objectives to the critical-to-quality features. This comprehensive framework can help move organizations from where they currently are to where they want to be, laying the background needed for customer satisfaction and breakthrough performance.
Show less
Date Issued: 2016
Identifier: CFE0006246, ucf:51079
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0006246

Title: THE RELATIONSHIP OF 10TH-GRADE DISTRICT PROGRESS MONITORING ASSESSMENT SCORES TO FLORIDA COMPREHENSIVE ASSESSMENT TEST SCORES IN READING AND MATHEMATICS FOR 2008-2009.
Creator: Underwood, Marilyn, Taylor, Rosemarye, University of Central Florida
Abstract / Description: The focus of this research was to investigate the use of a district created formative benchmark assessment in reading to predict student achievement for 10th-grade students on the Florida Comprehensive Assessment Test (FCAT) in one county in north central Florida. The purpose of the study was to provide information to high school principals and teachers to better understand how students were performing and learning and to maximize use of the formative district benchmark assessment in order to...
Show moreThe focus of this research was to investigate the use of a district created formative benchmark assessment in reading to predict student achievement for 10th-grade students on the Florida Comprehensive Assessment Test (FCAT) in one county in north central Florida. The purpose of the study was to provide information to high school principals and teachers to better understand how students were performing and learning and to maximize use of the formative district benchmark assessment in order to modify instruction and positively impact student achievement. This study expanded a prior limited study which correlated district benchmark assessment scores to FCAT scores for students in grades three through five in five elementary schools in the targeted county. The high correlations suggested further study. This research focused on secondary reading, specifically in 10th grade where both state and targeted county FCAT scores were low in years preceding this research. Investigated were (a) the district formative assessment in reading as a predictor of FCAT Reading scores, (b) differences in strength of correlation and prediction among student subgroups and between high schools, and (c) any relationships between reading formative assessment scores and Mathematics FCAT scores. An additional focus of this study was to determine best leadership practices in schools where there were the highest correlations between the formative assessment and FCAT Reading scores. Research on best practices was reviewed, and principals were interviewed to determine trends and themes in practice. Tenth grade students in the seven Florida targeted district high schools were included in the study. The findings of the study supported the effective use of formative assessments both in instruction and as predictors of studentsÃƒÂƒÃ‚ÂƒÃƒÂ‚Ã‚ÂƒÃƒÂƒÃ‚Â‚ÃƒÂ‚Ã‚Â‚ÃƒÂƒÃ‚ÂƒÃƒÂ‚Ã‚Â‚ÃƒÂƒÃ‚Â‚ÃƒÂ‚Ã‚Â' performance on the FCAT. The results of the study also showed a significant correlation between performance on the reading formative assessment and performance on FCAT Mathematics. The data indicated no significant differences in the strength of correlation between student subgroups or between the high schools included in the study. Additionally, the practices of effective principals in using formative assessment data to inform instruction, gathered through personal interviews, were documented and described.
Show less
Date Issued: 2010
Identifier: CFE0003214, ucf:48573
Format: Document (PDF)
PURL: http://purl.flvc.org/ucf/fd/CFE0003214

FCAT (2)	+ -
NCLB (2)	+ -
accountability (2)	+ -
performance indicators (2)	+ -
Airlines (1)	+ -

Alignment (1)	+ -
BSC (1)	+ -
Balanced Scorecard (1)	+ -
BiPAP (1)	+ -
CPAP (1)	+ -
CTQ (1)	+ -
Computer Vision (1)	+ -
Conceptual Indices (1)	+ -
Critical to Quality (1)	+ -
Customer Requirements (1)	+ -
Customer Satisfaction (1)	+ -
DFSS (1)	+ -
DMADV (1)	+ -
Damage Detection (1)	+ -
Damage Identification (1)	+ -
Design for Six Sigma (1)	+ -
Dynamic Innovation Index (1)	+ -
Economic Development (1)	+ -
Economic Indices (1)	+ -
Entrepreneurship (1)	+ -
Florida (1)	+ -
Florida Comprehensive Assessment Test (1)	+ -
Florida School Indicator Report (1)	+ -
Influence Line (1)	+ -
Innovation (1)	+ -

ETD Collection (10)	+ -
Honors Collection (3)	+ -

University of Central Florida (13)	+ -
Shumaker, Randall (2)	+ -
Ahmad, Ali (1)	+ -
Akbas, Mustafa (1)	+ -
Alghamdi, Mohammed (1)	+ -

Aysun, Uluc (1)	+ -
Bozeman, William (1)	+ -
CATBAS, F. NECATI (1)	+ -
Carr, John (1)	+ -
Citron, Albert (1)	+ -
Elshennawy, Ahmad (1)	+ -
Gaught, William (1)	+ -
Goss, Taylor N (1)	+ -
Hahs-Vaughn, Debbie (1)	+ -
Hamann, Kerstin (1)	+ -
Handberg, Roger (1)	+ -
Hoekstra, Robert (1)	+ -
Houghton, David (1)	+ -
Jasinski, Jana (1)	+ -
Karwowski, Waldemar (1)	+ -
Lee, Gene (1)	+ -
Li, Jun (1)	+ -
Marano, Alexis (1)	+ -
McGill, Susan (1)	+ -
Nobles, Matt (1)	+ -
Rabelo, Luis (1)	+ -
Rohde, Kyle (1)	+ -
Rovito, Michael J. (1)	+ -
Rutherford, Ashley (1)	+ -
Salgado, Joel (1)	+ -

Search In

Sort Results By:

Narrow results by:

Topical Subject

Collection

Type of Resource

Language

Creator

Format

Owner